EPCAM and ovarian cancer: Ovarian cancer cell lines were selected based on their EpCAM protein expression levels: two EpCAM-negative lines (H134S, A2780; MFI: 4.6±0.05, 2.6±0.14, respectively), SKOV3 with an intermediate EpCAM expression level (MFI: 104±3) and two cell lines (CaOV3, OVCAR3) with a high EpCAM expression level (MFI: 461±30; 496±24, respectively) (Figure 2A).